Definición de slow-twitch en inglés:

adjetivo

Mechanical efficiency depends upon the extent to which the swimmer can recruit slow-twitch muscle fibres, which are more efficient at converting chemical energy into muscle contraction than are fast-twitch fibres.

Athletes know that building slow-twitch muscle comes from endurance training and regular exercise.

In these cases, the myosin in the FT fibres became more like that in the slow-twitch fibres.